How To Calculate Quantity In Construction?

How To Calculate Quantity In Construction
There are many methods used for calculating quantities of materials. Which one goes with your plan depends on the design and shape of the building. Each method is characteristically different from other. Calculation of quantities of material needs a proper technical understanding of materials and construction.

  • The five major methods are described here for you and they come up with the right measurement of materials you need.1.
  • Centre Line Method: Centre line method is applicable to the square building with symmetrical offsets.
  • To calculate the quantities of materials, you need to multiply the total centre line length with breadth and depth of the construction.

The centre line length will be reduced by half of breadth of every junction where the main wall is joined with the cross walls, partitions or verandah. The junctions must be taken into consideration while calculating the centre line length of a wall. The quantity estimation brought out by this method is accurate and fast.2.

Crossing method: Crossing method is designed for calculating materials needed for masonry walls. In this method, the lengths and breadths of walls at plinth level (the base on which a column is raised) are included. The internal dimension of the room and the thickness of the walls are also important to calculate the quantities.

Symmetrical offsets should be counted as they play a major role in the calculation of quantity of materials.3. Out to out and in to in method: This method follows P.W.D system for computing materials and this seems to be the most accurate method among all.4.

  1. Bay method: This bay method is applicable in garages, factory, and railway platform where identical structures are visible.
  2. Bay in a construction term means a compartment of a building.
  3. The cost of one room is calculated first and it is multiplied by the number of bays.5.
  4. Service unit method: The term service unit method is designed for building with identical rooms.

This method is applicable in the construction of college, hospital, cinemas, prison, and more. When it is a construction of a hospital, the service unit will be a bed. Likewise, for cinema/stadium, it is seats. Calculating quantities of materials follow the above-mentioned methods.

How is earthwork quantity calculated?

Free 20 Questions 20 Marks 20 Mins Concept: The trapezoidal formula is given as, \(V=\frac \left\) Calculation: The section across the embankment would be trapezoidal in shape. For extreme edge (1): Top Width = 2 m, Heigth = 3, and Bottom width = 2 + 2 × 3 + 2 × 3 = 14 m \(⇒ A_1 = \frac × h=\frac × 3=24\;m^2\) For extreme edge (2): Top Width = 4 m, Heigth = 5, Bottom width = 4 + 2 × 5 + 2 × 5 = 24 m \(⇒ A_2 = \frac × h=\frac × 5=70\;m^2\) The volume of earthwork \(\Rightarrow V = \frac \left=\frac \left=4700\) m 3,

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How do you calculate order of quantities?

How do you calculate the economic order quantity? – To calculate the economic order quantity, you will need the following variables: demand rate, setup costs, and holding costs. The formula is: EOQ = square root of: / holding costs,

What is quantity with example?

Quantity – Definition and Solved Examples In basic terms, quantity is the amount or the number of something. We also define quantity as an amount, number, or measurement. It answers the question ‘how much?’. Quantities can also be understood as numbers; for example, this book has 55 pages or the container has ‘x’ quantity or the number of black pens.

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What is quantity give example?

A quantity is usually presented as a product of a magnitude and a unit. For example, the quantity of height of the Empire State Building is 1454 feet. It would take 1454 foot-long rulers to measure the building from the ground to its tip.

What is the formula of material used?

Beginning Materials + Costs of Materials Purchased – Ending Materials = Direct Material Used.

How do you calculate m3 of concrete?

Cubic meter is nothing but the SI unit of volume. For the construction of buildings, you need to know how to calculate cubic meter of concrete so that you can buy building materials accordingly and avoid buying less or excess materials. How to calculate cubic meter of concrete? During construction, you need to have a proper mixture of the materials and need to know how much concrete is to be used.

Which cement you are using What proportion of concrete you are trying to make How much the laborers charge in that specific area The location and ground condition Time required( less time=more charge; more time=less charge)

How to calculate cost of concrete per cubic meter? For M20 concrete grade, you will need a ratio of 1: 1.5: 3 of cement, sand, and coarse aggregates respectively. Materials(kg) required Dry volume = Wet Volume X 1.52 Volume of Cement = (arid volume X Cement ratio)/ Sum total of ratio Volume of Cement = (1 X 1.52)/(1+1.5+3) = 1.52/5.5 = 0.28m3 Amount of the cement = 0.28 X 1500 = 420 kg.

Volume of Sand = (1.5 X 1.54)/(1+1.5+3) = 2.31/5.5 = 0.42m3 Amount of the Sand = 0.42 X 1700 = 714 kg. Volume of Coarse Aggregate= (3 X 1.54)/(1+1.5+3) = 4.62/5.5 = 0.84m3 Amount of the Coarse Aggregate = 0.84 X 1650 = 1386 kg. Cost of concrete per cubic meter Cost of cement for 1 m3 = Bags required = 420/50 =8.4 Bags If a bag of cement costs Rs: 330 = 8.4 X 330 = Rs 2772 Cost of sand for 1 m3 = If Cost of 1 m3 of sand is Rs: 1200 = 0.42 X 1200 =Rs 504 Price of coarse aggregate for 1 m3 = If Cost of 1m3 of coarse aggregate is as Rs.1500 = 0.84 X 1500 = 1260 Rs So, total money required for 1m3 of M – 20 concrete is =Price of cement + sand + coarse aggregate = 2772 + 504 + 1260 = 4536 Rs.

Rs 4500 (approx) Get free consultation from NoBroker interior design services and know all the details. We hope you now know how to calculate cubic meter of concrete and can estimate how much money you are going to need to complete your desired construction.

How do you calculate cut and fill quantities?

2. Grid Method – The grid method of calculation involves drawing a grid onto the plan for the earthwork project. For each node of the grid, determine the existing and proposed ground level and calculate the cut or fill required. Once the cut or fill depth is calculated, multiply the value by the area of the grid cell.

  • Do this for each square of the grid, then add the volumes together to determine the total cut and fill volumes for the project.
  • Like the cross-section method of calculation, the grid method takes time to implement and is significantly more time-consuming than any automatic systems.
  • Additionally, the accuracy of the grid method depends on the size of the grid cell.

Larger cells take less time to calculate but are less accurate, while smaller cells are more accurate but take more time to calculate.

How do you calculate excavation quantity?

A common situation in construction estimating and planning is the excavation of a pit or trench with sloped sides. For example: (from: ) In this example, we have a trench of unknown length with the sides of the excavation cut back at a slope of 1:1. The bottom of the trench is 5 feet wide.

If we assume the depth is also 5 feet, then the top of the trench is 15 feet wide. The cross-sectional area of the trench is (5+15)/2*5, or the average trench width of 10 feet * 5 feet deep = 50 square feet. If the trench is 100 feet long, and the ends of the trench excavation are not also sloped, then the volume is 50 * 100 = 5000 cubic feet, or 185 cubic yards.

Now, what if we have a column footing that is 3 feet x 3 feet and all four sides are sloped? Many would calculate the volume as the average width * the average length * the depth, or 10*10*5 = 500 cf, or 18.5 cy. But that is not the correct calculation. What you are looking at is a pyramidal frustum. It’s a pyramid with the top cut off. The formula for finding its volume is: Reference:,area%2C%20and%20the%20top%20area. The variables are h for the height, A1 for the area of the base, and A2 for the area of the top. To transform this for use with our excavation, Ab will be the area of the bottom of the excavation, At will be the area of the top of the excavation, and D will be the depth. Ab = Wb * Lb, where Wb and Lb are the width and length of the bottom of the excavation. At = Wt * Lt, where Wt and Lt are the width and length of the top of the excavation. In our example, Wb = Lb = 5 and Wt = Lt = 15, so Ab = 5 * 5 = 2 5 and At = 15 * 15 = 225, and D = 5, Therefore, the volume is: = 542 cf or 20.0 cy. This is 1.5 cy more than the 18.5 cy we calculated using the average width and length, or 8% more. So, it was close but not correct to use the average width for a pyramidal frustum. The formula can be: Or, to replace and with the calculated values based on slope, where the slope factor is (1:1 is 1, 0.5:1 is 0.5, etc.): In this formula, all we need to know are the length and width of the pit bottom, the depth, and the slope factor. In estimating, approximations are acceptable. We could also argue that the excavation will not actually be done so exactingly and we cannot know the actual excavated quantity.

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But we have an interest in improving the quality of estimates by eliminating errors that are under our control. Using the average width to calculate the volume of a sloped sided pit is an incorrect calculation of the quantity we want, not an approximation. Some will say, “But that’s a more complex formula and I won’t remember it.” This is where there is added value in a knowledgebase that already has the formula built in to produce the calculation for you – the same way – every time.

You don’t have to remember the formula or perform the calculation. You just provide the dimensions and you get the correct answer – every time.

What is the formula for quantity demanded?

2. Use the demand function for quantity. You use the demand formula, Qd = x + yP, to find the demand line algebraically or on a graph. In this equation, Qd represents the number of demanded hats, x represents the quantity and P represents the price of hats in dollars.

How do I calculate quantity in Excel?

Excel for Microsoft 365 Excel for Microsoft 365 for Mac Excel for the web Excel 2021 Excel 2021 for Mac Excel 2019 Excel 2019 for Mac Excel 2016 Excel 2016 for Mac Excel 2013 Excel 2010 Excel 2007 Excel for Mac 2011 Excel Starter 2010 More.Less The COUNT function counts the number of cells that contain numbers, and counts numbers within the list of arguments.

What is a quantity on order?

What’s the difference between quantity on hand/quantity available etc. in inFlow On-Premise? When looking at your stock levels, there are many different types of quantities in inFlow On-Premise. This helps you get more specific information about your stock when you’re reviewing your operations. How To Calculate Quantity In Construction Quantity On Hand: This number is the total you have physically available (including Qty Reserved), minus any items that have already been “picked” in a sales order (i.e. what’s still on your warehouse shelves). Quantity Picked: This number is the total that has already been picked in sales orders/work orders and are awaiting shipment (think of them as sitting in a box waiting to be shipped out).

  1. Quantity Reserved: This number is the total ordered by your customers (across all open sales orders/work orders).
  2. This number is what you need to be fulfilling to complete sales/production! Quantity Available: This number is how many of the item you have left if you fulfill all open sales orders and is therefore equal to Qty on Hand – Qty Reserved.

(i.e. what’s left after you’ve shipped all your current orders).

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If it’s a positive number then you can see how many you have left to sell to future customers and new sales orders. If it’s a negative number it’s a good indicator that you don’t have enough to fulfill all open sales orders, and that you need to reorder more stock.

Quantity on Order: This number is how many you’ve ordered from your supplier/vendor but haven’t received. This also includes quantities of items being made in a work order. Quantity in Transit: This is specifically items that have been sent via Transfer Stock and are still in the “Transit” status (i.e.

  1. You’ve sent the transfer but it has not been received at the other location yet).
  2. Quantity Owned: This number is your overall total.
  3. It can be found only in the Inventory Summary Report/Historical Inventory Report, and it is equal to the total of Qty On Hand + Qty Picked.
  4. Current Anticipated Quantity: This number is shown in the Reorder Stock window.

It’s how inFlow determines whether or not you need to reorder more stock. The formula quantity on hand – quantity reserved + quantity on order. This way, it takes into account all physical items, subtracts the number you need to fulfill to your customers, and adds the number you already have on open purchase orders.

  • Quantity Used: This Quantity is only shown on the Estimated Inventory Duration report.
  • This Quantity is the number of products sold or used in a Work Order during the time period designated on the report.
  • InFlow Inventory, Toronto, ON, M4M 3L1 : What’s the difference between quantity on hand/quantity available etc.

in inFlow On-Premise?

How do you calculate the quantity of materials for M25 grade concrete?

How much cement required for m25 concrete? – There are several grades of concrete, including M5, M 7.5, M10, M15, M20, and M 25. However, we must learn about the concrete of the m25 grade in this topic. M Stand for mix, and the number 25 represents the compressive strength after a 28-day curing period.

What is the formula of material used?

Beginning Materials + Costs of Materials Purchased – Ending Materials = Direct Material Used.

Which method is easiest for the estimation of quantity of material?

What is Center Line Method – Centre line method is adopted for walls of similar cross sections. In centre line method, total centre line length of all the walls is first measured, provided walls are of same type, long and short having same cross section and same type of footings.

Centre line method proves to be very simple for rectangular, circular, polygonal buildings which have no cross walls.In case of buildings with cross walls or partition walls, proper consideration must be given at every junction to calculate correct quantity.In case of buildings with one partition wall or cross wall having two junctions, for earthwork in foundation trench and foundation concrete, deduction of one breadth of trench or concrete from total centre length. For each junction half breadth of the respective item is to be deducted from the total centre length.For footings, deduction of one breadth from the total centre length is to be done for two junctions.In case of number of footings, the length of first footing is determined by applying half breadth as deduction per junction from the total centre line length and for subsequent footing, simply offset for every junction to the length of previous footing.At every stage deduction of half breadth of the main wall at that particular level shall have to be made per junction i.e. overall one breadth for two junctions from the total centre line length, and this net centre length after deduction shall be multiplied by the respective breadth and depth to get total quantities.If two walls come from opposite directions and they meet at the same point, there will be two junctions.For buildings having different type of walls, each set of walls have to be considered separately. All the outer walls or main walls shall be considered first together and then all inter or cross walls must be considered. There is no provision of deduction for main walls or outer walls. However, deduction of half breadth of main wall, for each junction must be made for inter or cross walls.At corners of building where two walls meet, there is no provision for addition or deduction.